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Finding the Third Proportional to 990.61 and 1,533.09

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Solution

The third proportional to 990.61 and 1,533.09 is: 2,372.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    990.61 : 1,533.09 = 1,533.09 : x
  2. Step 2: Convert to fraction form
    990.61/1,533.09 = 1,533.09/x
  3. Step 3: Cross multiply
    990.61x = 1,533.09 × 1,533.09
  4. Step 4: Simplify right side
    990.61x = 2,350,376.45
  5. Step 5: Solve for x
    x = 2,350,376.45/990.61
  6. Step 6: Final answer
    x = 2,372.66

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Why These Related Problems?

These problems maintain the same ratio (1.55) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.